| 1 | /* |
| 2 | * Test the CLC instruction. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | #include <assert.h> |
| 7 | #include <signal.h> |
| 8 | #include <stdlib.h> |
| 9 | #include <string.h> |
| 10 | #include <unistd.h> |
| 11 | |
| 12 | static void handle_sigsegv(int sig, siginfo_t *info, void *ucontext) |
| 13 | { |
| 14 | mcontext_t *mcontext = &((ucontext_t *)ucontext)->uc_mcontext; |
| 15 | if (mcontext->gregs[0] != 600) { |
| 16 | write(STDERR_FILENO, "bad r0\n", 7); |
| 17 | _exit(EXIT_FAILURE); |
| 18 | } |
| 19 | if (((mcontext->psw.mask >> 44) & 3) != 1) { |
| 20 | write(STDERR_FILENO, "bad cc\n", 7); |
| 21 | _exit(EXIT_FAILURE); |
| 22 | } |
| 23 | _exit(EXIT_SUCCESS); |
| 24 | } |
| 25 | |
| 26 | int main(void) |
| 27 | { |
| 28 | register unsigned long r0 asm("r0"); |
| 29 | unsigned long mem = 42, rhs = 500; |
| 30 | struct sigaction act; |
| 31 | int err; |
| 32 | |
| 33 | memset(&act, 0, sizeof(act)); |
| 34 | act.sa_sigaction = handle_sigsegv; |
| 35 | act.sa_flags = SA_SIGINFO; |
| 36 | err = sigaction(SIGSEGV, &act, NULL); |
| 37 | assert(err == 0); |
| 38 | |
| 39 | r0 = 100; |
| 40 | asm("algr %[r0],%[rhs]\n" |
| 41 | "clc 0(8,%[mem]),0(0)\n" /* The 2nd operand will cause a SEGV. */ |
| 42 | : [r0] "+r" (r0) |
| 43 | : [mem] "r" (&mem) |
| 44 | , [rhs] "r" (rhs) |
| 45 | : "cc", "memory"); |
| 46 | |
| 47 | return EXIT_FAILURE; |
| 48 | } |